Question 818080
let the rate of one jet be x
other will be x+30

they are moving away from each other
so add up speeds
x+x+30=2x+30 mph

d=2490

t= 3 hours

3(2x+30)=2490

/3
2x+30=2490/3

2x+30=830
2x=800
x=400

rate of the jets 400 & 430 mph